wet dust remover

ABSTRACT

This invention relates A wet dust remover, comprising a Venturi tube and a cylindrical washer, wherein the Venturi tube includes a convergent section, a throat section and a diffusion section, the sidewall of said throat section is provided with one or more through holes, the outer ends of the one or more through holes are connected to a pressure water pipe, the outer end of said diffusion section constitutes the outlet of the Venturi tube, the outer end of said convergent section constitutes the inlet of the Venturi tube, wherein the cylindrical washer includes a plurality of nozzles and a plurality of layers of dehydration wire meshes, the plurality of nozzles and the plurality of layers of dehydration wire meshes are placed in cross sections inside cylindrical washer. This wet dust remover feature less investment, high dust removing efficiency and relative long life, low water consumption and low operation costs and it can be mainly used in dusting applications for industrial dust and high concentration flue gas of all industrial furnaces and kilns.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a wet dust remover which is mainly used industing applications for industrial dusts and for high concentrationflue gases of all industrial furnaces and kilns.

2. Description of the Related Art

At present, industrial dusting methods may be classified as dry dustingand wet dusting. The dry dusting mainly includes cloth-bag dustingtechnique and electric dusting technique; the wet dusting mainlyincludes spray tower, foam column, Venturi tube, and impact orself-excitation dusting technique and so on. Each technique has its ownadvantage and disadvantage, suitable for different usages. The maindefects of dry dusting include large amount investment, high operationcosts and large floor area; and the wet dusting is constricted by thedust properties, even if it is suitable for the dust condition, it shallpay more attention to the problems including dusting efficiency, servicelife and water consumption.

SUMMARY OF THE INVENTION

To overcome the disadvantage of present techniques, this inventionoffers a wet dust remover which needs less investment with higherdusting efficiency, longer service life, lower water consumption andlower operation costs.

The technical solution of this invention to achieve above purposes is: awet dust remover comprising a Venturi tube and a cylindrical washer,wherein the Venturi tube includes a convergent section, a throat sectionand a diffusion section, the sidewall of said throat section is providedwith one or more through holes, the outer ends of the one or morethrough holes are connected to a pressure water pipe, the outer end ofsaid diffusion section constitutes the outlet of the Venturi tube, theouter end of said convergent section constitutes the inlet of theVenturi tube, wherein the cylindrical washer includes a plurality ofnozzles and a plurality of layers of dehydration wire meshes, theplurality of nozzles and the plurality of layers of dehydration wiremeshes are placed in cross sections inside cylindrical washer.

The throat section is a rectangular tube.

The number of through holes is a plural, evenly located on two oppositesides of the rectangular tube.

The through holes on sidewall of the throat section spreads on theentire throat section or more than half of the throat section from theconnection position of throat section and convergent section.

The one or more through holes are enclosed by an enclosure case outsideof the throat section, wherein the enclosure case is connected withwater inlet pipe which connects a pump.

The cylindrical washer is of a U shape, composed of two incorporatedcylinder shell. An inlet pipe of cylindrical washer is connected to onecylinder shell of cylindrical washer and an outlet pipe is installed onthe top of another cylinder shell of cylindrical washer.

The bottom of said cylindrical washer is of an arched shape.

The number of said dehydration wire meshes is from one to three.

Each of the cylinder shell has a plurality of said nozzles and theplurality of said layers of dehydration in it.

The main operational principle and advantageous effects of thisinvention is as follow: the treated gas, flue gas, passes through thepipe from the convergent section end of Venturi tube into the tube, theflow rate of gas increases after passing the throat section due to theconvergence of tube diameter and static negative pressure is establishedin the tube. The said high pressure water pipe is connected with thecleaning solution. Pump the cleaning solution into the throat section ofVenturi tube with pump together with the negative effect; the gasinvolves the cleaning solution into the air flow for fully mixing up tolet the dust in air into the cleaning solution; the air flow enters thecylindrical washer after getting out of the diffusion section where thecleaning solution water fog sprayed from the nozzles continuouslycollide with the air flow for further dusting; meanwhile the water fogin air flow collides with the wire net and attaches on it when passingthrough due to the decreased air flow speed in cylindrical washer, sothat the dusts are removed. This invention has a high dusting efficiencydue to its combination of the efficient Venturi tube with air-solutionseparation cylindrical washer; the high pressure water supply method isused in throat section of Venturi tube so that the defect of lesscleaning solution of present techniques due to they only depend thenegative pressure resulted from high pressure air flow is overcame andit ensures adequate solution air ratio, as a result it enhances thedusting efficiency. In addition, large amount of water enter the throatsection due to the high pressure and a layer of water film forms on thesidewall of throat section, it well protects the sidewall of throatsection which is severely worn and helps extending the service life.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural scheme of an embodiment of this invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As shown in FIG. 1, this wet dust remover consists of Venturi tube andcylindrical washer. The air outlet of said Venturi tube is connectedwith the air inlet of cylindrical washer. The said Venturi tube consistsof convergent section 11, throat section 12 and diffusion section 13.There are several through holes 14 on the sidewall of said throatsection, the outside of which is connected with pressure water pipe 15.The outer end of said diffusion section composes the outlet of saidVenturi tube and the outer end of said convergent section composes theinlet of said Venturi tube. There are several nozzles 25 spreading onthe separated cross sections in the said cylindrical washer as well asseveral layers of dehydration wire meshes 26. The convergent section,throat section and diffusion section of said Venturi tube are integratedtogether, they can be welded, flange connected or be integral. The saidthroat section is normally of sizing rectangle tube. The said throughholes are set on the two sidewalls corresponding to four walls of throatsection or on the four sidewalls. They spread on the entire throatsection or more than half of the throat section from the connectionposition of throat section and convergent section so as to form thewater film on the sidewall of the whole throat section. There isenclosure case at the outside of said throat section where the throughholes exist and the case encloses the through holes on sidewall. Thesaid enclosure case is connected with water inlet pipe on which there iswater pump to pump pressure water into case. By use of such case, thewater supply to through holes becomes easier and certain static pressurecan be established to ensure the basic equality of the water supplypressure of all through holes. In practice, the said throat sectionconsists of two opposite sidewalls and two opposite rectangle watertanks between the two sidewalls; the inner sidewall of said rectanglewater tank composes the sidewall of said throat section on which thereare said through holes. The said cylindrical washer is of U shape, itsair inlet pipe is of horizontal tangential inlet configuration andinstalled on the cylinder wall at one side 22 of U-shape structure; itsoutlet pipe 23 is installed on the top of cylinder wall at another side24 of U-shape structure and extends upward so that the air flow fromVenturi tube into the cylindrical washer can form rotation flow in thecylinder chamber at the side of air inlet pipe of cylindrical washer tofurther enhance the air-solution mixing capacity; the rotation flowvanishes after passing through the said dehydration wire net for certaindistance. The stable air flow forms in the cylinder cavity at anotherside of cylindrical washer for air-solution separation. The bottom ofsaid cylindrical washer is of arc shape, and the air flow changes thedirection at the bottom of cylindrical washer so as to centrifuge outthe water drop. The layer amount of said hydration wire net is normally1 to 3 and the gap of wire net is between 1.5 and 2.5 mm which dependson the properties, concentration and air flow rate of dusts. The saidnozzles are evenly distributed on the whole cross section; the particlediameter of atomized water drop is between 0.5 mm and 1.5 mm; when thewater fog collides with the dust particle, the water fog sticks the dustparticles and agglomerates to form large water drop for ease ofhydration. The inspection manhole can be set on the said cylinder body.

It will be apparent to those skilled in the art that variousmodification and variations can be made in the device of the presentinvention without departing from the spirit or scope of the invention.Thus, it is intended that the present invention cover modifications andvariations that come within the scope of the appended claims and theirequivalents.

1. A wet dust remover, comprising: a Venturi tube; and a cylindrical washer, wherein the Venturi tube includes a convergent section, a throat section and a diffusion section, wherein a sidewall of said throat section is provided with one or more through holes, wherein outer ends of the one or more through holes are connected to a pressure water pipe, wherein an outer end of said diffusion section forms an outlet of the Venturi tube and an outer end of said convergent section forms an inlet of the Venturi tube, and wherein the cylindrical washer includes a plurality of nozzles and a plurality of layers of dehydration wire meshes, wherein the plurality of nozzles and the plurality of layers of dehydration wire meshes are placed in a cross sections inside cylindrical washer.
 2. The system of claim 1, wherein the throat section is a rectangular tube.
 3. The system of claim 2, wherein the sidewall of the throat section is provided with a plurality of through holes evenly located on two opposite sides of the rectangular tube.
 4. The system of claim 3, wherein the through holes on the sidewall of the throat section spread on the entire throat section or more than a half of the throat section from a connection position of the throat section and the convergent section.
 5. The system of claim 4, wherein the one or more through holes are enclosed by an enclosure case outside of the throat section, and wherein the enclosure case is connected with a water inlet pipe which is connected to a pump.
 6. The system of claim 1, wherein the cylindrical washer is of a U shape and is formed of two incorporated cylinder shells.
 7. The system of claim 6, wherein an inlet pipe of the cylindrical washer is connected to one cylinder shell of the cylindrical washer and an outlet pipe is installed on a top of another cylinder shell of the cylindrical washer.
 8. The system of claim 7, wherein the bottom of said cylindrical washer is of an arched shape.
 9. The system of claim 8, wherein the number of said dehydration wire meshes is from one to three.
 10. The system of claim 9, wherein each of the cylinder shell has a plurality of said nozzles and the plurality of said layers of dehydration in it.
 11. The system of claim 5, wherein the cylindrical washer is of an U shape and is formed of two incorporated cylinder shells.
 12. The system of claim 11, wherein an inlet pipe of the cylindrical washer is connected to one cylinder shell of the cylindrical washer and an outlet pipe is installed on a top of another cylinder shell of the cylindrical washer.
 13. The system of claim 12, wherein the bottom of said cylindrical washer is of an arched shape.
 14. The system of claim 13, wherein the number of said dehydration wire meshes is from one to three.
 15. The system of claim 14, wherein each of the cylinder shell has a plurality of said nozzles and the plurality of said layers of dehydration in it. 